mutter/cogl/cogl-path/cogl-path-types.h

/*
 * Cogl
 *
 * A Low Level GPU Graphics and Utilities API
 *
 * Copyright (C) 2008,2009,2013 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *
 */

#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
#error "Only <cogl/cogl.h> can be included directly."
#endif

#ifndef __COGL_PATH_TYPES_H__
#define __COGL_PATH_TYPES_H__

#include <cogl/cogl-types.h>

COGL_BEGIN_DECLS

typedef struct _CoglPath CoglPath;

/**
 * CoglPathFillRule:
 * @COGL_PATH_FILL_RULE_NON_ZERO: Each time the line crosses an edge of
 * the path from left to right one is added to a counter and each time
 * it crosses from right to left the counter is decremented. If the
 * counter is non-zero then the point will be filled. See <xref
 * linkend="fill-rule-non-zero"/>.
 * @COGL_PATH_FILL_RULE_EVEN_ODD: If the line crosses an edge of the
 * path an odd number of times then the point will filled, otherwise
 * it won't. See <xref linkend="fill-rule-even-odd"/>.
 *
 * #CoglPathFillRule is used to determine how a path is filled. There
 * are two options - 'non-zero' and 'even-odd'. To work out whether any
 * point will be filled imagine drawing an infinetely long line in any
 * direction from that point. The number of times and the direction
 * that the edges of the path crosses this line determines whether the
 * line is filled as described below. Any open sub paths are treated
 * as if there was an extra line joining the first point and the last
 * point.
 *
 * The default fill rule when creating a path is %COGL_PATH_FILL_RULE_EVEN_ODD.
 *
 * <figure id="fill-rule-non-zero">
 *   <title>Example of filling various paths using the non-zero rule</title>
 *   <graphic fileref="fill-rule-non-zero.png" format="PNG"/>
 * </figure>
 *
 * <figure id="fill-rule-even-odd">
 *   <title>Example of filling various paths using the even-odd rule</title>
 *   <graphic fileref="fill-rule-even-odd.png" format="PNG"/>
 * </figure>
 *
 * Since: 1.4
 */
typedef enum {
  COGL_PATH_FILL_RULE_NON_ZERO,
  COGL_PATH_FILL_RULE_EVEN_ODD
} CoglPathFillRule;

COGL_END_DECLS

#endif /* __COGL_PATH_TYPES_H__ */